Incumbent

The word "incumbent" is derived from the Latin verb incumbere, literally meaning "to lean or lay upon" with the present participle stem incumbent-, "leaning a variant of encumber,[1] while encumber is derived from the root cumber,[2] most appropriately defined: "To occupy obstructively or inconveniently; to block fill up with what hinders freedom of motion or action; to burden, load."[3]

In general, an incumbent has a political advantage over challengers at elections. Except when the timing of elections is determined by a constitution or by legislation, the incumbent may have the right to determine the date of an election.

For most political offices, the incumbent often has more name recognition due to their previous work in the office. Incumbents also have easier access to campaign finance, as well as government resources (such as the franking privilege) that can be indirectly used to boost the incumbent's re-election campaign.

In the United States, an election (especially for a single-member constituency in a legislature) in which an incumbent is not seeking re-election is often called an open seat; because of the lack of incumbency advantage, these are often amongst the most hotly contested races in any election. Also, an open contest is created when the term of office is limited, as in the case of terms of the U.S. president being restricted to two four-year terms, and the incumbent is prohibited from recontesting.

When newcomers look to fill an open office, voters tend to compare and contrast the candidates' qualifications, positions on political issues, and personal characteristics in a relatively straightforward way. Elections featuring an incumbent, on the other hand, are, as Guy Molyneux puts it, "fundamentally a referendum on the incumbent."[4] Voters will first grapple with the record of the incumbent. Only if they decide to "fire" the incumbent do they begin to evaluate whether each of the challengers is an acceptable alternative.

A 2017 study in the British Journal of Political Science argues that the incumbency advantage stems from the fact that voters evaluate the incumbent's ideology individually whereas they assume that any challenger shares his party's ideology.[5] This means that the incumbency advantage gets more significant as political polarization increases.[5] A 2017 study in the Journal of Politics found that incumbents have "a far larger advantage" in on-cycle elections than in off-cycle elections.[6]

However, there exist scenarios in which the incumbency factor itself leads to the downfall of the incumbent. Popularly known as the anti-incumbency factor, situations of this kind occur when the incumbent has proven himself not worthy of office during his tenure and the challengers demonstrate this to the voters. An anti-incumbency factor can also be responsible for bringing down incumbents who have been in office for many successive terms despite performance indicators, simply because the voters are convinced by the challengers of a need for change. It is also argued that the holders of extensively powerful offices are subject to immense pressure which leaves them politically impotent and unable to command enough public confidence for re-election; such is the case, for example, with the Presidency of France.[7] Voters who experience the negative economic shock of a loss of income are less likely to vote for an incumbent candidate than those who have not experienced such a shock.[8]

Nick Panagakis, a pollster, coined what he dubbed the incumbent rule in 1989—that any voter who claims to be undecided towards the end of the election will probably end up voting for a challenger.[9]

In France, the phenomenon is known by the catchphrase "Sortez les sortants" (get out the outgoing [representatives]!) which was the slogan of the Poujadist movement in the 1956 French legislative election.

• Sophomore surge
• Lists of office-holders
• List of current heads of state and government
• Outgoing politician
  • List of presidents who did not win reelection
• Virtual incumbent

• Oxford English Dictionary. 2nd ed. 1989. Print.

Look up incumbent in Wiktionary, the free dictionary.

• De Magalhaes, L. (2015). Incumbency effects in a comparative perspective: Evidence from Brazilian mayoral elections. Political Analysis, 23(1), 113–126.